LU-1538 tests: standardize test script init – misc tests

LU-1538 tests: standardize test script init – misc tests

Standardize the initial Lustre test script initialization for
clarity and consistency test suites are that are not normally
run during patch and branch testing.

The LUSTRE path is already normalized in init_test_env(), so this
doesn't need to be done in the caller.  Use $(...) subshells instead
of `...` in the affected lines.  Remove NAME, SRCDIR, PATH, MULTIOP,
SETUP, CLEANUP, CHECKSTAT, TMP, SAVE_PWD, variable initialization,
since it is already done in init_test_env() or not needed in the test
scripts.

Remove MACHINEFILE from dom-performance because it is now
included init_test_env().

Move all definitions of ALWAYS_EXCEPT and SLOW to after
init_test_env() and init_logging() and call build_test_filter()
immediately after the ALWAYS_EXCEPT and SLOW definitions.

Test-Parameters: trivial envdefinitions=SLOW=yes,ENABLE_QUOTA=yes \
clientcount=2 osscount=1 ostcount=7 mdscount=1 mdtcount=1 \
austeroptions=-R testlist=lfsck-performance

Test-Parameters: envdefinitions=SLOW=yes,ENABLE_QUOTA=yes \
clientcount=2 osscount=1 ostcount=7 mdscount=1 mdtcount=1 \
austeroptions=-R testlist=sgpdd-survey

Test-Parameters: envdefinitions=SLOW=yes,ENABLE_QUOTA=yes \
clientcount=2 osscount=1 ostcount=7 mdscount=1 mdtcount=1 \
austeroptions=-R clientselinux testlist=sanity-selinux

Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I21280eb10de4d70ec3d7b4d6c8b8e976fb0821cc
Reviewed-on: https://review.whamcloud.com/36372
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>